<template>
  <div class="city-list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">
          当前城市
        </div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button" 
            @click="$router.push('/home')"
            >{{this.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" 
          v-for="item in hotCities" 
          :key="item.id"
          @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div 
      class="area" 
      v-for="(value,key) of cities" 
      :key="key" 
      :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
            v-for="inner of value"
            :key="inner.id"
            @click="handleCityClick(inner.name)"
          >{{inner.name}}</div>
          
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
  name:"CityList",
  props:{
    cities:Object,
    hotCities:Array,
    letter:String
  },
  computed:{
    ...mapState(['city'])
  },
  methods:{
    handleCityClick(city){
      this.changeCity(city)
      this.$router.push('/home')
    },
    ...mapMutations(['changeCity'])
  },
  mounted(){
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch:{
    letter(){
      if(this.letter){
        const ele=this.$refs[this.letter][0]
        this.scroll.scrollToElement(ele)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
.border-topbottom
  &:before
    border-color #ccc
  &:after
    border-color #ccc
.border-bottom 
  &:before
    border-color #ccc
.city-list
  overflow hidden
  position absolute
  top 1.48rem
  left 0
  right 0
  bottom 0
  .title
    line-height .54rem
    background-color #eee
    padding-left .2rem 
    color #666
    font-size .26rem
  .button-list
    padding .1rem .6rem .1rem .1rem
    overflow hidden
    .button-wrapper
      float left
      width 33.33%
      .button
        padding .1rem 0
        margin  .1rem
        text-align center
        border .02rem solid #ccc
        border-radius .06rem
  .item-list
    .item 
      line-height .74rem
      padding-left .2rem
</style>